The 1968 275GTB/4 Berlinetta Ferrari carries the long nose and short tail synonymous with the classic sports car.

In order to restore the Ferrari to its former glory, one of the UK's best-known Ferrari specialists, Bob Houghton Ltd, renovated the car last summer. It was a no expense spared project that came to a total of €237,300 (£197,773). The interior has also been fully refurbished by the world renowned Italian trimmers, Luppi & Co.

This 3.3-litre V12 Gran Turismo is thought to be the best of its kind currently on sale anywhere in the world and, with only around 47,000km on the odometer, the Ferrari comes with an estimate of €2,100,000-2,600,000 (£1,700,000-2,200,000).

This car, chassis number 10905, was completed in January 1968, two years after Ferrari introduced the 275GTB/4 in place of the 275GTB series – so-called due to the four overhead camshafts in place of its predecessor's two.

It was delivered to its first owner in Maione, Italy, in March that year, before being exported to the USA two years later. By 1979 it had passed into the ownership of W Michael Grey, a businessman in California, who completely restored the car before its sale in 1980.

Under the ownership of Walter Storz of Lörrach, Germany, the car was finished in red with black interior, and featured Borrani wire wheels. It was sold in September 1985 to Jacques Borloz of Switzerland.

From mainland Europe, 10905 was shipped to Ireland where it spent the following few years in the hands of a well-known collector, before being sold to the current vendor at the end of 2011.

On sale alongside the classic Ferrari is an original-liveried 1989 Porsche 962C Group C Sports Prototype, which carries an estimate of €750,000-950,000 (£620,000-790,000).

Chassis number 962-006BM was one of just eight racing prototypes built by John Thompson's TC Prototypes company, and was campaigned by Brun Motorsport throughout the 1989 season.

Driven by the likes of Oscar Larrauri, Roland Ratzenberger and Stanley Dickens, 006 was raced seven times that year, and was sponsored by Jägermeister for three of those races. It also took part in five rounds of the World Sports Prototype Championship.

German Ferrari specialist and tuner, Willy König, bought the car in 1990 after it was damaged in Mexico. It had not been repaired or raced when it was sold in 1998 to Tony O'Neill, who sent it to specialists Group C Ltd to complete a full restoration in 2000.

Since its acquisition by the current vendor from Porsche and Jaguar collector, Henry Pearman, 006 has taken part in the RMU Classic, Dix Mille Tours, Can-Am Interserie Challenge and Masters Historic Racing series, finishing second at Montjuïc in April 2012.

Bonhams is selling this racing Porsche in the Jägermeister trademark orange livery and carrying number 16, just as the car did at Spa in 1989.

It also featured in the 60th anniversary edition of Autosport magazine for which three-time Le Mans winner Allan McNish track-tested the car in 2010.

As well as a complete restoration in 2000, there are numerous invoices on file from Peter Chambers Automotive Ltd of Tewkesbury, totalling over €91,000 (£76,000) and 006 is offered complete with documentation, a short tail on the car, and a spare long tail.

Sholto Gilbertson, senior motoring specialist at Bonhams, said: "These cars are in exceptional condition having had a significant amount of restoration work done to them.

"The 275GTB is a beautiful car and is regarded by many as the finest Grand Tourer ever made by Ferrari. In contrast, the aggressive racing Porsche is a prototype from a much later era but is equally charismatic.

"Both are in full working order, which makes them the perfect purchase for any passionate collector."

NOTES FOR EDITORS

Bonhams, founded in 1793, is one of the world's largest auctioneers of fine art and antiques. The present company was formed by the merger in November 2001 of Bonhams & Brooks and Phillips Son & Neale. In August 2002, the company acquired Butterfields, the principal firm of auctioneers on the West Coast of America. Today, Bonhams offers more sales than any of its rivals, through two major salerooms in London: New Bond Street and Knightsbridge; and a further three in the UK regions and Scotland. Sales are also held in San Francisco, Los Angeles, Carmel, New York and Connecticut in the USA; and Germany, France, Monaco, Hong Kong and Australia. Bonhams has a worldwide network of offices and regional representatives in 25 countries offering sales advice and valuation services in 60 specialist areas. For a full listing of upcoming sales, plus details of Bonhams specialist departments go to www.bonhams.com